Chusetts



(No odel.) A Y I W. BDRAPER 8v JyH. NORTHROP.

LOOM.

No. 572,746. al Patented Dec. 8, 1896.

UNITED STATES ATENT rricn.

VVILLIAM F. DRAPER AND JAMES H. NORTHROP, OF HOPEDALE, MASSA- CHUSETTS, ASSIGNORSTO THE NORTHROP LOOM COMPANY, OF SAME PLACE AND SACO, MAINE.

LOOM.

SPECIFICATION forming part of Letters Patent No. 572,746, dated-December 8, 1896.

Application filed September 19, 1896. Serial No. 606,440. (No model.)

To allen/hom t may concern,.-

Be it known that we, WILLIAM F. DRAPER and JAMES H. NoRrHnoP, of Hopedale, in the county of Worcester and State of Massachusetts, have invented an Improvement in Looms, of which the following description, in connection with the accompanying drawings, isaspeciiication, like letters on the drawings representing like parts.

It is well known in the art of weaving that every time the loom is stopped, whether for breakage of the filling or when the shipper handle or lever is actuated, to piece up warpthreads a thin place or crack will be made in goods where the picks are not numerous. The formation of such thin places is thought to be due to several causes, some of which are the change of tension as the loom slows down, backlash in the bearings, amount of wear in the crank-arms, dac. In our efforts to obviate the formation of such cracks or thin places we have found that by increasing the warp-tension at the time the loom stops such desired object is attained, and accordingly our invention has for its object the production of means to prevent cracks or thin places when the loom stops for any cause whatever. Y

Figure l is a left-hand side elevation of a -sufficient portion of a loom to be understood with one embodiment of our invention applied thereto. Fig. 2 is a partial top or plan view of the mechanism shown in Fig. l 5 and Fig. 3 is an enlarged detail, in front elevation,

-idly connected to a cross rod or shaft m2, held in bearings w3 on the loom sides, only one of such supports and bearings being shown, and one of the supports, preferably the one on the side of the loom nearest the shipper-handle, has an upturned rigid arm Q04. A dog (shown as a long rod or link c) is pivotally connected at c with said arm, the other end of the arm extending toward the front of the loom. A slotted plate c2, (see Fig. 2,) having an ear c3, is held on'the inner side of the arm by a bolt c4 and adjusted by a screw-stud c5, bearing against a lug c6 on the arm, and we have herein shown a cooperating bunter cX as secured to one of the supports 5 of the reedcap R.

Upon the top of the breastfbeam A2 we have shown a guide d, in which is mounted a longitudinally-movable controller, consisting of a slide-plate d', having a shoulder d2 and a hooked outer end d3, both extended across the path of the shipper-lever S. The controller is notched or provided with lugs dx, between which the front end ol' the dog c loosely enters, the longitudinal movement of the controller d moving the dog laterally to bring the ear'c3 thereof into or out of the.

path of movement of the bunter 0X.

Vhen the shipper-lever is in the position` shown in Figs. l and 2 and full lines, Fig. 3, to stop the loom the shoulder d2 of the controller is engaged and held thereby in such position that the dog will be retained in operative position, and as the lay comes forward the bunter 0X will act on the ear c3 of and move the dog longitudinally inthe directionof the arrow 10, Fig. l. Such movement of the dog swings the whip-roll supports fw and raises the whip-roll w against the warp, increasing the tension thereof, and this increase of tension is effected every time the loom is stopped for any cause whatsoever. If the loom is running normally, the shipper-lever' will be held in the notch SX, and it then engages the hooked end d3 of the controller d', moving it in the guide d into dotted-line position, Fig. 3, the whip-roll then occupying its normal position. controller by the shipper-lever is sufficient to so deflect the dog c that its ear cS will be moved to one side of the path of the bunter, and the latter will not engage and operate the dog in the movement of the lay.

The ear c3 is preferably made adjustable on the dog c to compensate for wear and to accurately adjust the parts.

This movement of the IOO inasmuch as the controller for the dog is governed by the operation of the stopping mechanism for the loom, it will be evident that said stopping mechanism cannot be operated to stop the loom Without moving the dog into operative position, so that the warptension will be automatically increased upon stoppage of the loom.

Our invention is not restricted to the precise construction and arrangement herein shown, for, so far as we are aware, it is broadly new to increase the warp-tension automatically upon stoppage o'l the loom.

Having fully described our invention, what we claim as new, and desire to secure by Letters Patent, is-

l. In a loom, normal]y-inoperative means to act upon and increase the tension of the warp, combined with mechanism operative upon stoppage ofthe loom, to move said means and thereby increase the warp-tension, substantially as described.

2. In a loom, normally-inoperative means to act upon and increase the tension of the warp, stopping mechanism for the loom, and intermediate devices, controlled by operation of the stopping mechanism, to move the means for increasing the warp-tension, substantially as described.

3. In a loom, normally-inoperative means to act upon the warp between the warp-beam and the fell of the cloth, a dog connected with said means, operative upon stoppage of the loom,and a bunter to coperate with and move the dog, substantially as described.

a. In a loom, a movable whip-roll, to act upon the warp, combined with mechanism operative upon stoppage of the loom, to move the whip-roll and thereby increase the tension of the warp, substantially as described.

5. In a loom, a movable whip-roll to act upon the warp, stopping mechanism for the loom, and intermediate devices, controlled by operation of the stopping mechanism, to move the whip-roll against and thereby increase the tension of the Warp substantially as described.

6. In a loom, a whip-roll, mounted upon a swinging support, a dog connected with said support, a coperatin g bunter, and means operative upon stoppage of the loom to move the dog into position to be engaged by the bunter, whereby the Whip-roll will be swung to increase the warp-tension, substantially as described.

7. In a loom, normally-inoperative means to act upon and increase the tension of the warp, a dog connected therewith, the lay, and a bunter thereon to cooperate with said dog7 combined with stopping mechanism for the loom, and conections between it and the dog, to move the latter into position to be engaged by the bunter when the stopping mechanism is operated, substantially as described..

S. In a loom, the lay and a bunter thereon, a movable whip-roll, a normally-inoperative dog connected therewith, to be engaged by the bunter, and controlling means for the dog', operative upon stoppage of the loom, to move the dog into operative position, whereby the whip-roll is moved against and to increase the tension of the warp, substantially as described.

9. In a loom, normally-inoperative means to act upon and increase the tension of the warp, a connected dog, a bunter to engageand move the dog, a dog-controller, and a shipperlever, movement of the shipper-lever to stop the loom operatin g the controller and thereby bringing the dog into the path of the bunter, substantially as described.

In testimony whereof we have signed our names to this specication in the presence of two subscribing witnesses.

WILLIAM F. DRAPER. JAMES I-I. NORTHROP. Vitnesses:

WM. W. KNIGHTs, GEORGE O'rrs DRAPER. 

